Boiler-tube cutter.



No. 709,509. Pa'tented Sept. 23, I902.

J. H. PULLARD. BOILER TUBE CUTTER.

(Abplication filed June 4, 1902.|

(No Model.)

g anveml'oz. witnesses W i atmnut NITED STATES ATENT OFFICE.

JOHN HENRY POLLARD, OF OENTRALIA, ILLINOIS.

BOILER-TUBE CUTTER.

SPECIFICATION formingpart of Letters Patent No. 709,509, dated September23, 1902-.

Application filed June 4, 1902. Serial No. 110,222. tNo model.)

To all whom it may concern:

Be it known that I, JOHN HENRY POLLARD, a citizen of the United States,residing at Centralia, in the county of Marion and State of Illinois,have invented certain new and useful Improvements in Boiler-TubeCutters, of which the following is a specification.

My invention relates to machines for cutting boiler-tubes, and has forone of its objects to provide a device that will cut the tubes from theinside and so arranged that when turned in one direction thecuttingblade will be projected, while when turned in the oppositedirection the blade will be concealed in the casing of the device.

Another object of my invention is to provide means for automaticallylubricating the cutting-blade and the tube while being cut.

Additional ad vantages of my invention will more fully appearhereinafter and by reference to the accompanying drawings, in which-Figure 1 is a view of the exterior of my cutter; Fig. 2, a longitudinalsectional view showing a portion of the driving-spindle in elevation;Fig. 3, an end view; and Fig. 4:, a cross-section of Fig. 2 on the line4 4, taken in the direction of the arrow.

Referring to the drawings, in which similar reference charactersindicate corresponding parts throughout the several views, A representsthe casing of my device, which is divided into two chambers a and a bythe partition A. The chamber a is designed for an oil-chamber and isconnected with the chamber a by means of a valve-port B.

0 represents a valve-plug which is screwthreaded to fit into thescrew-threaded aperture D in the end of the casing A and is designed tobe removed when it is desired to replenish the oil in chamber Ct.

E is a stem secured to plug 0 and having a conical-shaped head 2 to fitthe valve-port B, this structure being designed to control the flow ofthe oil from chamber a to chamber ct by turning plug 0.

The end of easing A surrounding the aperture D is made slanting andprovided with left-hand cutting-facets F and is designed to act as areamer in loosening dirt, rust, or any foreign accumulation from theends of the boiler-tubes, so as to permit easy insertion of thecutting-tool.

The chamber a, which will be called the cutting-chamber to distinguishit from the oil-chamber a, is made open at its end to receive thespindle G, which has its end g formed to receive any preferred drivingdevice, the drawings showing the end screwthreaded,though any othersuitable formmay be substituted. The spindle G is secured in the chambera by means of the union H, fitting over the annular shoulder I on saidspindle G and secured on the screw-threads K on the end of the casing A.The shoulder I is provided With a clutch 'II, which bears against thelug h on the union H to cause a rotation of said union and casing whenthe spindle A is turned in the direction to bring said clutch 1' and lugh in contact. The exterior of the union H is formed With two shoulders Land L, as shown in Fig. 2, the shoulder L being designed to receive theflange m on the sleeve M, which rests against the flue-sheet while thecutting-blade, hereinafter described, is cutting the boiler-tube, Nrepresenting a ring resting against the top of the sleeve M and theshoulder L and secured to the union H by means of the pin 0 to hold thesaid sleeve M in place.

The end of the spindle G is recessed, as shown at P, to receive thecutting-blade Q, the bottom of said recess being formed with a circularportion 19, as shown in Fig. 4, which penetrates the wall of the recessP, as shown at 1) in Fig. 2, said circular portions p and 19 beingdesigned to receive the circular head q of the cutter Q, so that it isjournaled therein. The body of the cutter Q, is formed with a heavy bodyportion Q and a narrowed cutting edge and point Q", the left side of thebody portion Q being angular in cross-section, as shown at q, while theright side is formed with a substantially rectangular recess g, whichbegins at the circular head q and extends nearly to the outer portion ofthe body of the cutter Q, thus leaving a projecting tooth 1 which whenthe spindle G is turned toward the right bears against the abrupt edge4' of the slot R in the casing A and pushes the cutting-point Q" outinto engage ment with the tube to be out, the opposite edge 1" of saidslot B being formed with an inWardly-slantin g surface to permit thewithdrawal of the cutting-blade inside the chamber a when the spindle Gis turned back toward the left after the tube has been cut. The base ofthe recess P is formed with a projecting portion 13, that bears againstthe angular side q of the cutting-blade Q in forcing the blade out ofthe slot R, and a substantially rectangular portion 19 to fit into therectangular recess q in said blade in withdrawing the blade into thechamber at.

It will be understood from the above description that by rotating thespindle G toward the left and inserting the casing A in the tube to becut any foreign substances that may have accumulated in the end of thetube are cut away to permit insertion of the tool in the tube. Thespindle is then turned toward the right, which causes the cuttingbladeto be projected from the casing A through the slot R, as abovedescribed, and a continuation of the rotation of the spindle toward theright causes the clutch t' to bear against the lug h, turning the casingand cutting-blade and cutting the boiler-tube at the pointdesired. Whilecutting the tube oil is fed to the cutting-blade to assist in theoperation through the valve-port B. After the tube has been cut thespindle is rotated in a reverse direction, by which operation thecutting-blade is withdrawn into the chamber a and the device may beremoved from the severed tube.

Having thus described my invention, what I claim is- 1. In a boiler-tubecutter, acasing containing the cutting mechanism, the end of said casingformed with a slanting surface, and cutting-facets on said slantingsurface, substantially as shown and described.

2. In a boiler-tube cutter, a casing formed with two communicatingchambers, one chamber containing the cutting device, the other chambercontaining oil and a screw-plug valve inserted in a screw-threaded borein the end of the casing, substantially as shown and described. I

3. In a boiler-tube cutter, a casing formed with two chambers by apartition having a valve-port, one of said chambers containing thecutting device, the other chamber containing oil, and a screw-plug valveinserted in a screw-threaded bore in the end of said casing having ahead to register with said valve-port to control the flow of oil to thecutting-blade, substantially as shown and described.

4. In a boiler-tube cutter, a spindle having a recess in its endprovided with a circular journal-bearing, a cutting-blade having a heavybody portion and a narrow cutting edge, one side of said body portionhaving an angular face, the other side having a recess therein, the baseof the recess on said spindle having a surface to bear against theangular surface of said body portion in projecting the blade, and with apart to fit into the recess on the other side of the blade,substantially as shown and described.

5. In a boiler-tube cutter, the combination of a casing having twochambers separated by a valved partition and a slot in the wall of onechamber, a spindle rotatably mounted in said slotted chamber, acutting-blade j on rnaled on said spindle, and means to force thecutting-blade out of said slot and return it to its normal position,substantially as shown and described.

6. In a boiler-tube cutter, the combination of a casing having twochambers therein separated by a valved partition, one of said chambershaving a slot in its wall, a spindle rotatably mounted in said slottedchamber, a cutting-blade journaled in said spindle, said cutting-bladehaving an angular edge and a recessed edge, andthe spindle formed tobear against said angular edge to project the blade, and to fit intosaid recess to retract it, substantially as shown and described.

7. In a boiler-tube cutter, a casing having two chambers separated by avalved partition, a spindle rotatably mounted in one of said chambers, acutting-blade journaled in the end thereof, a shoulder on said spindle,a clutch on said shoulder, a union fitting said spindle and shoulder andsecured to the edge of the casing, and a lug on said union against whichsaid clutch bears to turn the casing in cutting a tube, substantially asshown and described.

8. In a boiler-tube cutter, a spindle having a recess in its endprovided with a journalbearing,.a cutting-blade mounted in said recesshaving a head to fit into said journalbearing, a casing having twochambers separated by a valved partition, one of said chambers adaptedto receive the end of said spindle and having a slot through which saidoutting-blade extends in cutting a tube, an annular shoulder on saidspindle, a clutch on said shoulder, a union fitting said spindle andshoulder and secured to the edge of the casing, and a lug on said unionagainst which said clutch bears to turn the casing in cutting a tube,substantially as shown and described.

In testimony whereof I hereto affix my signature in the presence of twowitnesses.

JOHN HENRY POLLARD.

'Witnesses:

FRANK F. NOLEMAN, BELLA M. JAMES.

